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a² - 5ab + 3b² = Para a = 3 y b = 4
(3)² - 5(3)(4) + 3(4)² =
3 * 3 - 60 + 3(4 * 4) =
9 - 60 + 48 =
57 - 60 =
-3
Respuesta.
- 3